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Using Snap Tee's

Does anyone have any experience using a PVC snap tee to connect into an existing lateral line? I need to create another zone and using a snap tee sure seems easier than installing a regular tee. Just curious about the durabililty of a snap tee.

I'm not sure how you're going to create another zone by tapping into a lateral line. Mainline yes.
With that said, I have zero experience with a snap tee. They just look sketchy to me so I've never used one.
I definetly would never use one on a mainline. You'd probaby get away with it on a lateral.

MrGrumpy,
Since we sell them I should tell you they work perfectly.
Truth is, don't know. We do sell plenty but I've never found someone who has used one.
I've done it here but that's at a desk/controlled conditions.
Solid as it can be though.

I'm still learning so I apologize if this has been addressed before. If pvc is installed using a vibratory trencher, then the pipe is in place with earth on top of it. How would it be possible to cut the pvc, spread the pipe a couple inches to make room for the 't' since the pipe is in the ground???

It starts with a shovel and lots of digging.
If your pipe is flexible enough, and the soil gives enough, and you dig back far enough each way, you can cut out a small section and with great effort flex the pipe into the tee.
If not you can use something like Pipe Fix or Kwik Repair.
Like many things in this industry, it starts and ends with the shovel.